@afreay,
You can use valueFormatString to show the labels as a whole number. Also if you want to display labels only at the whole number position, you can use interval property. Please check the below code snippet –
axisY: {
valueFormatString: "#",
interval: 1
},
Kindly check this updated JSFiddle for a working example.
___________
Indranil Deo
Team CanvasJS